Premier Seeds

They are usually ok, and as you say at a reasonable price.
One year, I did get seeds that weren't for the squash I ordered. A bit disappointing when they take so long to grow, but have bought seed from them since with no problem.

I'm probably in a minority on here but I stopped using them as I've had more wrongly labelled stuff from them than anywhere else - I once got 3 different types of tomato from a single packet of seeds, none of which was the named variety. I also found their customer service to be poor with often no reply to complaints.